151421031 has 24 divisors (see below), whose sum is σ = 221695344. Its totient is φ = 99584640.

The previous prime is 151421027. The next prime is 151421041. The reversal of 151421031 is 130124151.

It is not a de Polignac number, because 151421031 - 2² = 151421027 is a prime.

It is a super-2 number, since 2×151421031² = 45856657258205922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 151420995 and 151421013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151421041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279621 + ... + 280161.

It is an arithmetic number, because the mean of its divisors is an integer number (9237306).

Almost surely, 2^151421031 is an apocalyptic number.

151421031 is a deficient number, since it is larger than the sum of its proper divisors (70274313).

151421031 is a wasteful number, since it uses less digits than its factorization.

151421031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 151421031 is about 12305.3253106125. The cubic root of 151421031 is about 533.0018702993.

Adding to 151421031 its reverse (130124151), we get a palindrome (281545182).

The spelling of 151421031 in words is "one hundred fifty-one million, four hundred twenty-one thousand, thirty-one".