151401990 has 16 divisors (see below), whose sum is σ = 363364848. Its totient is φ = 40373856.

The previous prime is 151401989. The next prime is 151402021. The reversal of 151401990 is 99104151.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 5046733 = 151401990 / (1 + 5 + 1 + 4 + 0 + 1 + 9 + 9 + 0).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2523337 + ... + 2523396.

It is an arithmetic number, because the mean of its divisors is an integer number (22710303).

Almost surely, 2^151401990 is an apocalyptic number.

151401990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

151401990 is an abundant number, since it is smaller than the sum of its proper divisors (211962858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151401990 is a wasteful number, since it uses less digits than its factorization.

151401990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5046743.

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 151401990 is about 12304.5515968685. The cubic root of 151401990 is about 532.9795279295.

The spelling of 151401990 in words is "one hundred fifty-one million, four hundred one thousand, nine hundred ninety".