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1221442534 = 21346978559
BaseRepresentation
bin100100011001101…
…1011101111100110
310011010100201011101
41020303123233212
510000142130114
6321111430314
742161042644
oct11063335746
93133321141
101221442534
11577521944
122a108539a
13166091380
14b8312194
1572373d74
hex48cdbbe6

1221442534 has 8 divisors (see below), whose sum is σ = 1973099520. Its totient is φ = 563742696.

The previous prime is 1221442529. The next prime is 1221442553. The reversal of 1221442534 is 4352441221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23489254 + ... + 23489305.

It is an arithmetic number, because the mean of its divisors is an integer number (246637440).

Almost surely, 21221442534 is an apocalyptic number.

1221442534 is a deficient number, since it is larger than the sum of its proper divisors (751656986).

1221442534 is a wasteful number, since it uses less digits than its factorization.

1221442534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46978574.

The product of its digits is 7680, while the sum is 28.

The square root of 1221442534 is about 34949.1421067814. The cubic root of 1221442534 is about 1068.9507092059.

Adding to 1221442534 its reverse (4352441221), we get a palindrome (5573883755).

The spelling of 1221442534 in words is "one billion, two hundred twenty-one million, four hundred forty-two thousand, five hundred thirty-four".

Divisors: 1 2 13 26 46978559 93957118 610721267 1221442534