151681426 has 32 divisors (see below), whose sum is σ = 260371440. Its totient is φ = 65753856.

The previous prime is 151681423. The next prime is 151681433. The reversal of 151681426 is 624186151.

It can be written as a sum of positive squares in 8 ways, for example, as 87441201 + 64240225 = 9351^2 + 8015^2 .

It is a junction number, because it is equal to n+sod(n) for n = 151681391 and 151681400.

It is not an unprimeable number, because it can be changed into a prime (151681423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25180 + ... + 30616.

Almost surely, 2^151681426 is an apocalyptic number.

151681426 is a deficient number, since it is larger than the sum of its proper divisors (108690014).

151681426 is a wasteful number, since it uses less digits than its factorization.

151681426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5518.

The product of its digits is 11520, while the sum is 34.

The square root of 151681426 is about 12315.9013474451. The cubic root of 151681426 is about 533.3072253713.

The spelling of 151681426 in words is "one hundred fifty-one million, six hundred eighty-one thousand, four hundred twenty-six".