151261031 has 4 divisors (see below), whose sum is σ = 151836432. Its totient is φ = 150685632.

The previous prime is 151261001. The next prime is 151261043. The reversal of 151261031 is 130162151.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 151261031 - 2¹⁴ = 151244647 is a prime.

It is a super-2 number, since 2×151261031² = 45759798998365922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151260994 and 151261012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151261001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287306 + ... + 287831.

It is an arithmetic number, because the mean of its divisors is an integer number (37959108).

Almost surely, 2^151261031 is an apocalyptic number.

151261031 is a deficient number, since it is larger than the sum of its proper divisors (575401).

151261031 is an equidigital number, since it uses as much as digits as its factorization.

151261031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575400.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 151261031 is about 12298.8223419968. The cubic root of 151261031 is about 532.8140708599.

The spelling of 151261031 in words is "one hundred fifty-one million, two hundred sixty-one thousand, thirty-one".